After changing the setting in the gui it worked immediately.
I have now moved my domoticz installation to the hummingboard and it seems to be much quicker. Still have to do some additional testing but everything seems to be working correct.
A small issue is the heatsink on the hummingboard. The heatsink is next to the IO pins and is also heigher then the pins. So the razberry does not fit by default. For the time being i put a couple of wires between the pins on the hummingboard and the razberry module, but i will replace them for something better.